Game: EcoQuest – The Search for Cetus

The first installment, titled The Search for Cetus, was released first on floppy disk, then on CD-ROM with full speech. Adam's attempts to help a dolphin named Delphineus that his father has rescued, takes a turn for the weirder when the dolphin starts talking. In no time flat, he's trying to seek out Cetus, the sperm whale king of Eluria, an underwater kingdom populated by marine animals. He has assistance in the form of several creatures found in the various ecosystems of the world. Aside from the considerable liberty of sentient talking and semi-anthropomorphic animals, the game is more realistic than cartoony – it needs to be, to tell about the real world's environment and pollution. The Search for Cetus introduced the recycling symbol to Sierra's standard palette of command icons, giving the player bonus points for picking up litter.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".